Easy Intense Cold achivment

It's easy to get "Intense Cold". Just do the rest of the instance the regular way, until you're in the last boss. If you pull aggro and die, the tank can pick the boss up and the rest of the group can kill it. Because of you dying at the start, you get the achievement, seeing as you didn't get more than two stacks of the buff. You can do it for your friends with any class.